The sx 0100 fix (cli.parse / json.parse name collision) is merged on sx
master, so `dist.sx` — co-importing std.cli (via dist) and std.json (via
json_out) — now lowers and builds. Finish the step:
- dist.sx: fix two real frontend errors the old IR-lowering crash had
masked — `main` returns `!` (noreturn exit tails), and the post-parse
dispatch is guarded by `if !perr` so the failable `p` is used only with
its error proven absent. Drop the stale BLOCKED narration.
- Makefile: `make build` now also compiles src/dist.sx -> build/dist;
`make test` depends on `build` so the acceptance test finds the binary.
- tests/cli_dispatch.sx: drives the BUILT build/dist via process.run and
asserts the std.cli exit-code + --json purity contract: no-args and
unknown-command -> human text on stderr + EX_USAGE (64); `ci publish
--json` -> stdout is a single valid JSON object (std.json.parse, no
trailing junk) with the human ack on stderr; `--help` lists ci/release.
Handlers stay honest stubs (real ci publish is P3.4). Gate green:
make build (build/dist), make test (7/7).
Stand up the foundation every later step depends on:
- Source layout: src/, src/infra/, tests/, examples/ (.gitkeep markers).
- Makefile: `build` compiles the smoke program via $SX, `test` runs the
runner over tests/**/*.sx, `publish-example` placeholder (real in P3.4).
Compiler located via `SX ?= /Users/agra/projects/sx/zig-out/bin/sx`.
- tests/run.sh: POSIX-sh runner; discovers tests/**/*.sx, runs each via
`$SX run`, prints ok/FAIL, exits 0 only when all pass (errors on zero
tests so the gate is never silently empty).
- tests/smoke.sx: passing smoke test importing modules/std.sx — proves
toolchain wiring end-to-end (std resolves via the binary's own location).
- .gitignore: ignore build/ artifacts.
